A019538 - OEIS

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A019538 as a triangular array

1

1 2

1 6 6

1 14 36 24

1 30 150 240 120

1 62 540 1560 1800 720

1 126 1806 8400 16800 15120 5040

1 254 5796 40824 126000 191520 141120 40320

1 510 18150 186480 834120 1905120 2328480 1451520 362880

1 1022 55980 818520 5103000 16435440 29635200 30240000 16329600 3628800

A019538 as a square array

`1`	`1`	`1`	`1`	`1`	`1`	`1`	`1`	`1`	`1`
`2`	`6`	`14`	`30`	`62`	`126`	`254`	`510`	`1022`
`6`	`36`	`150`	`540`	`1806`	`5796`	`18150`	`55980`
`24`	`240`	`1560`	`8400`	`40824`	`186480`	`818520`
`120`	`1800`	`16800`	`126000`	`834120`	`5103000`
`720`	`15120`	`191520`	`1905120`	`16435440`
`5040`	`141120`	`2328480`	`29635200`
`40320`	`1451520`	`30240000`
`362880`	`16329600`
`3628800`

A019538 as an upper right triangle

`1`	`1`	`1`	`1`	`1`	`1`	`1`	`1`	`1`	`1`
	`2`	`6`	`14`	`30`	`62`	`126`	`254`	`510`	`1022`
		`6`	`36`	`150`	`540`	`1806`	`5796`	`18150`	`55980`
			`24`	`240`	`1560`	`8400`	`40824`	`186480`	`818520`
				`120`	`1800`	`16800`	`126000`	`834120`	`5103000`
					`720`	`15120`	`191520`	`1905120`	`16435440`
						`5040`	`141120`	`2328480`	`29635200`
							`40320`	`1451520`	`30240000`
								`362880`	`16329600`
									`3628800`

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Last modified August 18 12:08 EDT 2024. Contains 375267 sequences. (Running on oeis4.)